Internal combustion engine



July 7,1931. 7 w, M BURNS 1,812,860

INTERNAL COMBUSTION ENGINE Filed June 17. 1929 2 Sheets-Sheet lgwue/ntoz Walter M. Burns July 7, 1931. w. M. BURNS :[NTERNAL COMBUSTIONENGINE Filed June 17, 1929 2 Sheets-Sheet 2 wafl'er M.Bumns PatentedJuly 7, 1931 UNITED STATES WALTER M. BURNS, OF ABSECON, NEW JERSEYINTERNAL COMBUSTION ENGINE Application filed June 17,

' This invention relates to improvements in internal combustion engines,the general ob-. ject of the invention being to provide means forconnecting the upper part of the crank case with the air intake'of thecarbureter so that crank case vapors and air will enter the carbureterduring the operation of the engine and thus ass with the miirture to thecylinders, where y the consumption of fuel to is reduced, the crank caseventilated, the piston and cylinder walls lubricated, leakage 0t oilfrom the crank case prevented, and the engine is easy to start in coldweather.

This invention also consists in certain other features of constructionand in the combination and arrangement of the several parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claim. In describing theinvention in detail, reference will be had to the accompanying drawingswherein like characters denote like or correspondin parts throughout thesev-' eral views, and in which Figure 1 is an elevation of the motorconstructed in accordance with this invention.

Figure 2 is a section on line 22 of Figure 1. Figure 3 is a section online 3 3 of Figure 2.

Figure 4 is a section on line H of Figure 1. Figure 5 is a section online 55 of Figure 3.

Figurefi is a view showing a modification. In these views, the numeral 1indicates a ipe connectin the air intake of the carureter 2 with t eupper portion of the crank case so that the suction created by thepistons will draw crank case vapors into the carbureter and then intothe cylinders when the motor is in operation. The flow of vapors throughthe pipe is controlled by a valve 3 and a valve in said pipecontrols'the flow of air through an air inlet 5 formed in said pipe 1,this air mixing with the vapors durmg the operation of the motor. Theamount 7 of air entering the pipe through the inlet 5 is regulated byadjusting the tension of the 1929. Serial No. 371,611.

spring 6 on the valve stem by means of a nut 7 on said stem.

The breather pipe 8 of the crank case is provided with a removable cap 9which contains a valve 10 opening inwardly and thus admitting air to thecrank case to prevent a. vacuum occurring therein. A screen 11 coversthe openings in the cap to prevent dirt and the like from entering thecrank case.

In the modification shown in Fi re 6, the pipe 1 connects the-air inlet0 the carbureter with the lower part of the breather pipe 8, thisbreather pipe being closed by the cap 9 carrying a valve 10, as beforedescribed.

Thus it will be seen that the suction created by the moving pistons willdraw crank case va ors and air from the crank case into the car ureterand thus into the cylinders. Air will enter the crank case through thebreather pipe and thus prevent a vacuum occurring in the crank case, dueto the removal of the crank case vapors therefrom and atmospheric air ismixed with the crank case vapors passing through the pipe 1 or .1through the adjustable air controlling valve 4 in the first form of theinvention or through 4 means of the adjustable valve 10 in the secondform of the invention.

This invention reduces the consumption of tilates the crank case,lubricates the motor parts by the oil contained in the vapors, preventsice forming in the crank case in cold weather by removing moisture fromthe crank case, prevents stalling of the motor on quick acceleration,makes easy starting, as atmospheric air is not delivered directly to thecarbureter and it also prevents crank case leakage, due to the partialvacuum in the crank case.

In both forms of the invention, a valve may be placed in the lower partof the breather tube to prevent escape of air from the crank casethrough said tube during the operation of the motor.

It is thought from the foregoing description that the advantages andnovel features of the invention will be readily apparent.

7 of the breather tube or It is to be understood that changes may bemade in the construction and in the com bination and arrangement, of theseveral parts, provided that such changes fall withm the scope of theappended claim.

What I claim is In an internal combustion engine, a pipe for connectinthe air intake of the carbureter thereof with the upper part of thecrank case, said pipe havirfi an air inlet port therein, an achustable vport, a valve for regulating the flow of vapors through the pi e, avalve in the cap reventing the escape of crank case vapors through thebreather tube. y

In testimony whereof I affix my signature.

WALTER M. BURNS.

ve for controlling said;

